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Proceedings Paper

Design of an MR-compatible fNIRS instrument
Author(s): Uzay Emir; Ahmet Ademoglu; Cengizhan Ozturk; Kubilay Aydin; Tamer Demiralp; Adnan Kurt; Alp Dincer; Ata Akin
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Paper Abstract

Acquiring functional near infrared spectroscopy (fNIRS) and functional magnetic resonance-imaging (fMRI) data are usually done asynchronously. In order to correlate these two different modalities’ data, measurements must be performed at the same time. In this study, we have designed a new MR compatible continuous wave intensity based fNIRS device to overcome this problem. For MR compatible fNIRS, we used two LEDs with wavelengths at 660 and 870 nm. There are four photodiodes for light detection. LEDs operated in a sequential multiplexing mode with adjustable "on" time for each LED. Emitted and diffused light was transferred to and from the tissue through 10 m long single mode plastic optical fibers (INDUSTRIAL FIBER OPTICS, INC.). By using fibers, we overcome MR compatibility problems that can be caused by semi-conductors on probe. This MR compatible fNIRS design can provide synchronous measurements with low cost.

Paper Details

Date Published: 25 April 2005
PDF: 4 pages
Proc. SPIE 5686, Photonic Therapeutics and Diagnostics, (25 April 2005); doi: 10.1117/12.590710
Show Author Affiliations
Uzay Emir, Bogazici Univ. (Turkey)
Ahmet Ademoglu, Bogazici Univ. (Turkey)
Cengizhan Ozturk, Bogazici Univ. (Turkey)
Kubilay Aydin, Istanbul Medical School/Istanbul Univ. (Turkey)
Tamer Demiralp, Istanbul Medical School/Istanbul Univ. (Turkey)
Adnan Kurt, Koc Univ. (Turkey)
Alp Dincer, Acibadem Hospital (Turkey)
Ata Akin, Bogazici Univ. (Turkey)

Published in SPIE Proceedings Vol. 5686:
Photonic Therapeutics and Diagnostics
Brian Jet-Fei Wong M.D.; Eugene A. Trowers M.D.; Kenton W. Gregory M.D.; Abraham Katzir; Nikiforos Kollias; Reza S. Malek M.D.; Henry Hirschberg M.D.; Kenneth Eugene Bartels D.V.M.; Steen J. Madsen; Lloyd P. Tate V.D.M.; Lawrence S. Bass M.D.; Werner T. W. de Riese; Karen M. McNally-Heintzelman, Editor(s)

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